给予SOCKET套接字的网络编程总结

基于DOS平台下SOCKET编程

首先创建服务器端程序

void main()

{

//首先加载套接字库,我这里用的是1.1版本,有兴趣的可以联2.0库,可以获得更多功能啊

WORD wVersionRequested;
WSADATA wsaData;
int err;
wVersionRequested = MAKEWORD( 1, 1 );
err = WSAStartup( wVersionRequested, &wsaData );
if ( err != 0 ) {
           return false;
}

if ( LOBYTE( wsaData.wVersion ) != 2 ||
        HIBYTE( wsaData.wVersion ) != 2 ) {
    WSACleanup( );
    return false;
}

//创建套接字,在这之前,还要加两个头文件和一个库文件,分别是

#include <Winsock2.h>

#include <stdio.h>

库文件要在设置.工程里面的连接选项中加入Use Ws2_32.lib

SOCKET s=socket(AF_INET,SOCK_DGRAM,0);

SOCKADDR_IN sockAddr;
sockAddr.sin_addr.S_un.S_addr = htonl(INADDR_ANY);
sockAddr.sin_family = AF_INET;
sockAddr.sin_port = htons(5000);//这里的端口可以随便设置,但必须和客户端的一致

//绑定套接字

bind(s,(sockaddr*)&sockAddr,sizeof(sockaddr));
    char recvBuff[100];
char sendBuff[100];
char tempBuff[100];
SOCKADDR_IN sockFrom;
int len = sizeof(sockaddr);
    while(true)
{
  ::recvfrom(s,recvBuff,100,0,(sockaddr*)&sockFrom,&len);
  if('q' == recvBuff[0])
  {
   printf("Chat end!/n");
   sendto(s,"q",strlen("q")+1,0,(sockaddr*)&sockFrom,len);
   break;
  }
        sprintf(tempBuff,"%s say: %s",inet_ntoa(sockFrom.sin_addr),recvBuff);
  printf("%s/n",tempBuff);
        gets(sendBuff);
        sendto(s,sendBuff,strlen(sendBuff)+1,0,(sockaddr*)&sockFrom,len);
}
    closesocket(s);
    WSACleanup( );

}

再来编写客户端代码

再先前的工作空间中建立一个工程UdpClient,至于加入头文件客库文件和服务器端一模一样

void main()

{

WORD wVersionRequested;
WSADATA wsaData;
int err;
    wVersionRequested = MAKEWORD( 1,1 );
err = WSAStartup( wVersionRequested, &wsaData );
if ( err != 0 ) {
     return ;
}
if ( LOBYTE( wsaData.wVersion ) != 1 ||
        HIBYTE( wsaData.wVersion ) != 1 ) {
     WSACleanup( );
  return ;
}

SOCKET s = socket(AF_INET,SOCK_DGRAM,0);
SOCKADDR_IN sockAddr;
sockAddr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
sockAddr.sin_family = AF_INET;
sockAddr.sin_port = htons(5000);

char sendBuff[100];
char recvBuff[100];
char tempBuff[100];
printf("聊天通道已经完成,开始吧!/n");
    SOCKADDR_IN sockFrom;
int len = sizeof(sockaddr);
while(true)
{
  gets(sendBuff);
  sendto(s,sendBuff,strlen(sendBuff)+1,0,(sockaddr*)&sockAddr,sizeof(sockaddr));
        recvfrom(s,recvBuff,100,0,(sockaddr*)&sockFrom,&len);
  if('q' == recvBuff[0])
  {
   printf("Chat End!/n");
   sendto(s,"q",strlen("q")+1,0,(sockaddr*)&sockFrom,sizeof(sockaddr));
   break;
  }
  sprintf(tempBuff,"%s say: %s",inet_ntoa(sockFrom.sin_addr),recvBuff);
  printf("%s/n",tempBuff);
}
closesocket(s);
    WSACleanup( );

}

这样,一个简单的聊天程序就完成了,但是它还有很多缺陷,比如说基于DOS的,客户端必须先发送数据,然后才是服务器端,交互性很差,由于它是基于UDP协议的,稳定性不是很理想,但作为初期的网络编程练习,我觉得还是恨道的,希望对你有帮助!

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给予SOCKET套接字的网络编程总结

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